SVENSK STANDARD SS-EN ISO 12625-5:2005 Fastställd 2005-05-13 Utgåva 1 Mjukpapper och mjukpappersprodukter Del 5: Bestämning av våtstyrka (våtdragstyrka) (ISO 12625-5:2005) Tissue paper and tissue products Part 5: Determination of wet tensile strength (ISO 12625-5:2005) ICS 85.060; 85.080 Språk: engelska Publicerad: juni 2005 Copyright SIS. Reproduction in any form without permission is prohibited.
Europastandarden EN ISO 12625-5:2005 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 12625-5:2005. Denna standard ersätter SS-EN 12625-5, utgåva 1. The European Standard EN ISO 12625-5:2005 has the status of a Swedish Standard. This document contains the official English version of EN ISO 12625-5:2005. This standard supersedes the Swedish Standard SS-EN 12625-5, edition 1. Upplysningar om sakinnehållet i standarden lämnas av SIS, Swedish Standards Institute, telefon 08-555 520 00. Standarder kan beställas hos SIS Förlag AB som även lämnar allmänna upplysningar om svensk och utländsk standard. Postadress: SIS Förlag AB, 118 80 STOCKHOLM Telefon: 08-555 523 10. Telefax: 08-555 523 11 E-post: sis.sales@sis.se. Internet: www.sis.se
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 12625-5 April 2005 ICS 85.080 Supersedes EN 12625-5:1999 English version Tissue paper and tissue products - Part 5: Determination of wet tensile strength (ISO 12625-5:2005) Papier tissu et produits en tissu - Partie 5: Détermination de la résistance à la rupture par traction à l'état humide (ISO 12625-5:2005) Tissue-Papier und Tissue-Produkte - Teil 5: Bestimmung der breitenbezogenen Nassbruchkraft (ISO 12625-5:2005) This European Standard was approved by CEN on 21 March 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-5:2005: E
EN ISO 12625-5:2005(E) Contents Page Foreword... iv 1 Scope... 1 2 Normative references... 1 3 Terms and definitions... 2 4 Principle... 2 5 Apparatus... 2 6 Conditioning... 5 7 Preparation... 5 8 Procedure... 6 9 Calculation... 9 10 Test report... 9 11 Precision... 10 Bibliography... 12 iii
EN ISO 12625-5:2005(E) Foreword This document (EN ISO 12625-5:2005) has been prepared by Technical Committee CEN/TC 172 "Pulp, paper and board", the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 6 "Paper, board and pulps. This document supersedes EN 12625-5:1999. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2005, and conflicting national standards shall be withdrawn at the latest by October 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. iv
EN ISO 12625-5:2005(E) Tissue paper and tissue products Part 5: Determination of wet tensile strength 1 Scope This part of ISO 12625 specifies a test method for the determination of the wet tensile strength of tissue paper and tissue products after soaking with water, using a tensile-strength-testing apparatus operating with a constant rate of elongation. Currently, two types of tensile-strength testers are commercially available, one where the test piece is positioned vertically and, for the other, horizontally. This part of ISO 12625 applies for both. For vertical tensile-strength testers, a device which is held in the lower grip of the tensile-strength tester, called a Finch Cup, is used to achieve the wetting. For horizontal tensile-strength testers, the soaking device is placed between the clamps. It is expressly stated that the detection of impurities and contraries in tissue paper and tissue products should be applied according to ISO 15755. For the determination of moisture content in tissue paper and tissue products, ISO 287 should be applied. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 186, Paper and board Sampling to determine average quality ISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples ISO 1924-2, Paper and board Determination of tensile properties Part 2: Constant rate of elongation method ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system ISO 12625-1, Tissue paper and tissue products Part 1: General guidance on terms ISO 12625-4, Tissue paper and tissue products Part 4: Determination of tensile strength, stretch at break and tensile energy absorption 1
EN ISO 12625-5:2005(E) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 12625-1 and the following apply. 3.1 wet tensile strength maximum tensile force per unit width that a test piece soaked with water will withstand before breaking in a tensile test NOTE The wet tensile strength is expressed in newtons per metre. 3.2 wet-tensile-strength retention ratio, expressed as a percentage, of the tensile strength of the wet test piece to the tensile strength of the same test piece in the dry, conditioned state 4 Principle A test piece of tissue paper or tissue product of given dimensions, soaked in water for a given period of time under specified conditions, is stretched (elongated) to break at a constant rate of elongation, using a tensile-strength-testing apparatus that measures and records the tensile force as a function of the elongation of the test piece. The test can be carried out by a vertical or a horizontal tensile-strength tester. In order to wet the test pieces for a vertical tensile-strength tester, a device, called a Finch Cup, which is held to the lower clamp, is used; while for a horizontal tensile-strength tester, a soaking cup is inserted between the clamps. From the wet tensile strength and the tensile strength of the same sample in the dry conditioned state, the wet-tensile-strength retention can be calculated. 5 Apparatus 5.1 Vertical tensile-strength tester 5.1.1 Tensile-strength-testing apparatus Tensile-strength-testing apparatus shall be in accordance with ISO 1924-2. It is capable of stretching a test piece of tissue paper or tissue product of given dimensions, at a constant rate of elongation of (50 2) mm/min, and recording the tensile force as a function of elongation on a strip chart recorder or any equivalent device. The force-measuring system shall measure loads with an accuracy of 1 % of the reading or 0,1 N, whichever is the greater. It shall be calibrated and verified in accordance with the requirements of ISO 7500-1. 5.1.2 Tensile-tester clamps The tensile-strength-testing apparatus (5.1.1) shall have an upper clamp with a minimum of 50 mm width, for holding both ends of the test piece firmly and without slippage. To avoid damaging the test pieces, the clamp surfaces that touch the pieces should be smooth and have rounded edges, i.e. free from burrs. The lower clamp shall be designed to grip the Finch Cup soaking device (5.1.3) firmly. The clamps shall have means for adjusting the clamping force. 2